Portable bench-tool.



E. A. HUFF.

PORTABLE BENCH TOOL.

APPLICATION FILED ocT.2.1914.

Patented Oct. -10,

3 SHlYETS-SHEET l.

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PORTABLE BENCH TOOL.

APPLlcATloN FILED ocT.21,1914.

Patented Oct. 10, 1916.

3 SHEETS-SHEET 2 y llllll 7@ gf t PORTABLE BENCH TOOL.

APPLICATION HLED ocT.21. 1914. 1,201,050.

EDWIN A. HUFF, OF BOSTON, MASSACHUSETTS.

PORTABLE BENCH-TOOL.

Specication of Letters Patent.

Patented Oct. 10, 1916.

Application led October 27, 1914.' Serial N o. 868,905.

\ T alli/.17mm z't may concern:

` and in the base of themachineI mount a Be it known that I, EDWIN A.HUEF, a 'citizen of the United States, and resident of Boston, county ofSuHolk, State of Massachusetts, have invented an Improvement in PortableBench-Tools, of which the following description, in connection with theaccompanying drawings, is a specication, like letters on the drawingsrepresenting like parts.

My invention is a self-contained poweractuated bench tool for small, inework, especially adapted to the use of dentists, jewelers, college andother laboratories, etc.

My object is to provide an exceedingly light, compact, and universallyadjustable machine which can be moved around on the professors table,the doctors shelf, the jewelers bench or show case', without injury or lstrain tQI'h@ machine, its place of rest, the user,"p1; vtlreI-vork. Inother words, I have soughtjto afford the humble artisan, scientist ormechanician, a single tool at small eX- pense, capable of taking theplace of a usually large, expensive and complicated series'of machines.

Besides the portable character of my machine, I mention among itsimportant features, 'considered both singlyand collectively, a chuckhaving direct connection with, or mounting on, the motor, and the latterhaving a hand controlled movement toward and from the work support, andpreferably also means for starting and stopping the motor capable ofbeing simultaneously actuated by the same hand which controls saidmovement and as it is so controlling said movement, a supporting guidefor said motor having accurate hand adjustment at any desired angle tothe work support, a rotatable table or bed, and a work support and sliderest mounted'on said table, having adjustment in two directions andcarrying a small work clamp. v

The power used is preferably electrical,

. small rheostatcontrol giving two or' more speeds. the tool chuck (adrill chuck for instance) so as not to bring a retarding friction orlpressure upon the armature, but leave the latter free to drive the work.The bed turns with reference to a scale and provided with a lockingstu'd, and handle for turning it,-s aid handle is specially made for.removal so as to be used to hold the armature Thrust bearings areprovided forlv while adjusting the chuck. Provision is made for lockingthe vertical or motor slide (whlch carries the chuck) for use as aprofiling machine, and the swinging movement of the support for saidslide renders the machine capable of many uses as a milling machine.

Various further features of construction, and resulting advantages, willbe made apparent in the course of the following description, taken inconnection with the accompanying drawings in which I have shown acomplete embodiment of the invention.v

In the drawings, Figure 1 shows the machine in side` elevation, partlybroken away for clearness of illustration; Figs. 2 and 3 are crosssectional views of portions of the handle switch; Figs. 4 and 5 and 6are views of the work `cla1np showingthe same respectively in crosssection, side elevation and top plan; Fig. 7 is an underside view of themachine showing the rheostat and base; F ig. 8 is a detail of thehandleabove mentioned;,Fig. 9 is a fragmentary central vertical section;andFig. 10 is a view of the machine in front elevation, broken away forclearness of illustration. g y

The base may be of any suitablershape, being herein lshown as mainlycircular, and' supported for convenience on four rubber j tipped legs orpedestals 2. Pivotallymounted by means of a bos; 6 on this b Se f1, is atable 4 adapted'to lbe turned by a handle 5 and provided at one sidewith a scale 6, see Fig. 1. rIhis table is cut o'ut with usual shapedunder-cut ways 7,4 see Fig. 10, in. which is mounted an under-slide rest8 engaged by a graduated screw 9, operated by a Vhandle 10 for accuratemovement across saiditable in one direction. This bottom slide restcarries a similarly mounted top slide rest'll actuated by a graduatedscrew 1.2 and handle 13. On said top rest, or forming a part thereof, isa plate 14 provided downv movement so' asto be engaged with the lefthand wall,Fig.9, of anyofthe vnotches 1.5 by being depressed theremto,or.

front edge of a locking block 20 in which a.l Y -thin .bar 21 is looselymounted for up and 25 is shaped to constitute guides 37, on whichdisengaged therefrom by being raised. For this purpose this bar hasvertically elongated slots 22,1 see Fig. 5, for receiving the pins 23 ofthe block 20. The block 2O carries a sesries of adjusting bolts, orpositioning bolts 24, whereby the block 16 may be tightly n clampedagainst one side of the work whose opposite vside rests against a blockor strong ledge`fat the farther edge of the plate 14.

Behindthe table 4 the base 1 has a rectangular vportion 26 on which isrigidly mounted a relatively strong and heavy bracket 27\ having asmooth, broad, fromJ face 28 for receiving vthe similarly shaped rearface of the lower end 29 of the up'- l right or support 30 for the motorand work tool, This support is centrally pivoted at 31 to the bracket 27by means of a stud 32, whose threaded end 33 is engaged by a hand nut34. -A scale 35 is provided on one edge of the part 29, Fig. 1, and thetwo members 28. and 29are removably locked together by a removable pin36,l when the scale indications show that the support is in trulyvertical position. The front face of the support moves a vertical slide38 held in any desired adjustment by properly operating a clampl lever44 which is pivotally connected to said motor `by a link 45 and isfulcrumed at 46 tothe upper end of the support 30. Said lever preferablyextends. rearwardly a short distance, 4and is provided with a counter-lbalance 47 so as to facilitate the accuracy and delicacy oftheadjustment of the motor and l'ool up and down with'reference to the .wor

`The motor is hereinvv shown as'an electric motor, .whose feed wires 48may derive cur rent through any convenient connection, being herein-Avshown as provided with a usual' plug 49,. wires leading; through abushing 50 in-thesupport 30 and thence through a'bushing151if 'inthebase to the rheostat 52 and its resistance 'coils53'and 54, zuidthenceback through' the bushings 51v and 50 to'the L .is indicated at 56,butaspany form of 'rheo-' lstat maybejused',f1 will not go'. intothe-de.. I tails ,of lconstruction thereof4 -The hand lever144is-hollwfand one .of .the circuit `wires is carried in fsaid;'hollen1vhandle,- as i j clearly shown at 57, Fig. 1', y and connected vtoahandle switch,jhere ainl shown as a coni tact ,plate'58,1secured to the:inner endof a rotatableihandle-end 59` to engage and dislengage withthe terminals 60, 61 of the two motor atr55. .Therheostat lever orswitch branches of the circuit wire which is contained in the hollowhand lever. The end, or hand switch 59, has a curved slot 62 forreceiving the projecting end of a fixed pin 63 which limits the rotarymotion of said switch, and the latter is secured to the lever -the plug49 has been screwed into a lamp socket so as to derive the requiredcurrent, the operator swings the rheostat lever 56 to the right positionfor the desired speed, and then clamps his Work in accurate position vbymeans of the work clamp and shifting the two compound slides one way orthe other so as to bring the work intoaccurate position beneath thedrill, for instance. Then the clamp 39 is turned so as to release themotor slide, and the operator, by means of the hand lever 44, moves lthemotor and drill down with the utmost accuracy to the point which is tobe drilled. If the work is exceedingly fine, so that the slightvibration of the motor makes it difficult for the point of the drill tofind the prick point of the Work, theoperator simply turns the handleend 59 so as to stop the motor, but without necessitating turning ofl"the current at the rheostat, or main switch, and as the'drill point isbrought `into nice position, exactly as required, he does not have totake his eye from the work or relieve his hold on the handle end 59 backto operating position,

and thereuponthe drill starts. This enables the Workman to maintainabsolute control of the drill, as well-*as the utmost precision ofmovement. down by hand by means of the leverv44 and clamps the toolwherever required by means ofthe handle 39. The tool may -be held at anyangle by means of .the adjustments provided bythe parts 27, 29, 32 and34, and the work may be turned at any angle by the ro- He moves the toolup and tation of the table 4. When it is-desired to I table is locked indesired adjustment by lsuitable means, as by a screw 67.

Nearly all of the large parts ofthe ma chine, excepting the base, aremade of aluminum and of'light construction, and this, coupled with theskeleton-like design and theexceedingly simple mountings, movements, andarrangements of parts, make the'lso machine very readily portable, andyet pose intended. Any rotary tool may be placed on the armature shaftor arbor y41,

and as the latter may be swung to any angle, it will be understood thatthe machine is capable of a Wide range of usefulness, which arrangementof parts herein shown -and` herein described as constituting thepreferred embodiment of my invention.

Having described my invention, whatA I claim to be new and desire tosecure by Letters Patent is: A

1'.- A machine of the kind described, comprising a` Work support, anupright toolsupport, a combined motor and tool carrier movable up anddown on said tool-support, anda hand lever pivoted to said support andto said combined motor and tool carrier for moving the latter by handtoward'and from the Work on said work support, and means on said handlever to control the rotation of said motor. A

2. A machine of the kind described, comprising a work support, anupright toolsupporta combined electric motor and "tool carrier movableup and down on said toolsupport, and a hand lever pivoted to saidsupport and to said combined motor and tool carrier f or`movingthelatter by hand t0- ward and from the work on said work support, saidhand-lever containing a starting and stoppin fswitch adapted to beoperated by the han which is operating the lever whereby the operatormay simultaneously and delicately control the motor and the po- Y sitionof the tool.

3. A machine of the kind described, having a motor and tool carriermounted for movement toward and from the work, and a counterbalancedhand lever attachedto the motor for simultaneously moving the motorthrust ofv said tool carrier, and means com.-

prising a handle for simultaneously moving said motor and tool carriertoward and from the work, and starting and stopping said motor.` L

' v5. A machine of the kind described, comprising a work support, anupright mounted nthereonto swing .at vau angle to the work c` support',al combined motorfand tool carrier mounted to slide on said upright, anda i hand-lever directly connected to said mov tor and pivoted onsaid'upright for sliding the motor and carrier toward and from the work.

prismg a work support, an upright .mounted thereonto swing at an angleto the work support, a combined motor and tool carrier -mounted to slideon said upright, and a hand-lever directly connected to said motor andpivoted 011 said upright for sliding the motor and carrier toward andfrom the work, said upright being provided with a hand operated clampfor clamping it at any desired angular adjustment.

7 A machine'of thekind described, comprising a work support, an uprightmounted thereon to swing at an angle to the Work support, 'a combinedmotor and tool carrier mounted to slide on said upright, a handleverldirectly connected to said motor "and pivoted on said upright forslidingl the mo.

1 6. A machine of the kind described, comtor and carrier toward and fromthe work,

said upright being provided with a hand operated clamp for clamping itat any desired angular adjustment, and means for f positively lockingthev upright in lvertical position.

8.` A machine of the kind described, comprising a work support, anupright mounted on said work support, a combined motor and tool carrierarranged to slideon said upright, a hand-lever pivoted to said up--right and to said carrier to move the carrier toward and from the work,and means for cutting oli driving power fromv the motor by a slightrotary movement of said hand-lever while moving said motor and carrierin its slide.

l. 9. A machine of the kind described, comprising a portable base, arotary table thereon, compound slide rests carried by said table andhaving lineal adjustment in two directions, a work clamp mounted thereonin position to hold the work beneath the tool, an upright mounted onsaid base, a combined electric motor and tool carrier mounted to slideon said upright toward and from the work, a hand lever directlyconnected to `said upright and to said motor for enabling-the operatorto move the motor and tool carrier at will by hand, said base beinghollow,

and containing a rheostat andl its switch I ever, connections fromsaidrheostat to said motor and to a switch plug, and said handlevercontaining a hand operated switch in the circuit of said motor forstarting and stopping the motor independently' of the rheostat.

10. A machine of the kind described, comprising a portable base, arotary table thereon, compound slide rests earned by said table andhaving lineal adjustment 1n two directions, a work clamp mounted thereonbined electric motorandtool carrier mounted to slide on said uprighttoward and from the work, a, counter-balanced hand lever pivoted to saidupright and to said motor for enabling the operator to move the motorand tool carrier at will with slight effort by hand, 'said base beinghollow and containing a rhestat and its switch lever, connections fromsaid rheostat to said motor and to a switch plug, said hand-lever beinghollow and containing' therein a portion of the cir-A cuit wires of saidmotor, and a hand operated switch for controlling the motor in- 15'EDWIN AQ Witnesses: i

GEO. H. MAXWLL, JAMES R. HODDER.

